Martinez, 28, knocked the 33-year-old Hasegawa down three times in the fight.

The fight was halted at 1:20 of the seventh round by referee Robert Byrd after Martinez knocked Hasegawa down twice in the round. Martinez had also knocked Hasegawa down in the second round from a big left hook to the head.

In the co-feature bout, Shinsuke Yamakana retained his WBC bantamweight title with a ninth round stoppage victory over Belgian Stephane Jamoye.

The 31-year-old dominated throughout the fight, dropping Jamoye with a straight left in the second round, while a body shot set up another count in the eighth.

He was down for a third time before the bell sounded and although Jamoye came out for the next, another left to the body left him down and out.

Yamanaka moves to 21-0 with two drawn, 16 of his wins coming inside the distance.